Patent GB-737107-A (GB)
Title: Improvements in printing mechanism for calculating machines
Inventor: HOLDEN NORMAN GEOFFREY
IPC: G06K15/04
Filed: 1952-12-24
Abstract: 737,107. Typewriters &c. POWERS - SAMAS ACCOUNTING MACHINES, Ltd. Dec. 8, 1953 [Dec. 24, 1952], No. 32758/52. Class 100 (4). Printing-mechanism for record-controlled calculating-machines arranged to handle amounts expressed partly in a non-decimal notation having more than twelve units in a denomination, such as pounds weight, e.g. of the kind described in Specification 528,106, has a single-toothed sectorshaped type-carrying element 12, Figs. 1, 2, movable to printing position in relation to a platen 22 under control of toothed denominational digitreceiving elements 2, 3, arranged to be arrested by stops 5, 6 set under control of a record card, and an amount is transferred to toothed register wheels which are employed as subtotal wheels by zeroizing the elements 2, 3 when in engagement with their respective register wheels 1, and is read off the wheels by bringing them into engagement with the elements. The general arrangement of the machine, including the control means for the register wheels, is similar to that described in Specification 526,762, [Group XIX], but the timing of the control mechanism is altered so that the wheels 1 engage with the elements 2, 3, after the latter and the other digit-receiving elements of the unit have been set from the stops of a stop-basket 4 as described in Specification 426,054, [Group XIX]. There is a single stop 5, Fig. 2, to co-operate with the element 2 and thirteen stops 6 to co-operate with the element 3. The stop 5 is representative of a unit weight of 14 lbs. and the stops 6 are representative of unit digits up to and including 13. Each row of stops 6 has a zero stop 7. A record card C is shown in Fig. 2, the amount which the various holes represent being marked against the holes which are in two rows 8, 9. Simultaneous sensing of a hole 8 and hole 9 is representative of an amount which is the sum of 14 lbs. and the digit represented by that particular hole 9, whilst sensing of a single hole represents an amount represented by the position of that hole. In that portion of the accumulator which deals with tons and quarters, and which is not shown, one toothed register wheel is provided for each tons denomination and has ten teeth, transfer occurring to next higher wheel when the lower passes from nine to nought, and two toothed wheels, one of which has ten teeth (representative of units), and one carry cam, and the other has ten teeth (representative of tens-of-hundred-weights), and five carry cams, to effect carries to the units wheel for the tons. There is also one register wheel for the quarters, and this has twelve teeth and three carry cams, and a transfer passes therefrom to the hundredweights unit wheel when each stage of the quarters passes from three to nought. The register wheel 1 for the first digit-receiving element 2 has ten teeth and five carry cams 10, and a carry is effected to the quarters register wheel each time the wheel passes from one to nought. The wheel 1 for the second digit-receiving element 3 has fourteen teeth and one carry cam 11 which operates each time it passes from thirteen to nought. The single type-carrying element 12 comprises a type sector which co-operates with element 3 and carries twenty-eight elements bearing characters as in Fig. 5, and the elements 2, 3, 12 are freely pivoted on a shaft 14. A dummy sector-element 15 is provided to restore element 2 to zero position and the elements 12, 15 are urged to turn on the shaft 14 by springs 16, 17 and are connected by springs 18 to the elements 2, 3, respectively. In the zero position of elements 2, 3 and 12, 15 shown in Fig. 2, zero stops 7 are engaged by members 19 on the elements 2, 3, and a gap 25 exists in this position between a latch 23 and tooth 24 on element 12. The sector element 2 and sector element 15 are restored to zero positions by a bar 26, carried by arms 27 and moved by a camoperated link 28 about the supporting shaft 14. The bar 26 is carried on a sleeve 29 having slots 30, and an auxiliary restoring member 31 carried by sleeve 29 supports a roller 32 for co-operation with a cam edge 33 of type sector element 12 to restore that element. An arm 34 fixed to sleeve 29 and pivoted to a link 35 is pivoted to a pin 36 secured, to one of the plates 37 which supports the shaft 14 the axis of which is eccentric to axis of that shaft. The restoring arms 27 are not moved forward until after the stops of the stop basket 4 have been set under control of a record card, and the setting up of any stop in a row of the basket 4 effects retraction of the zero stop 7 for that row. A first trip member 39 on stop 5 engages the tail of latch 23 to turn it, against a spring 40, so that when type sector 12 moves forward its tooth 24 is not engaged by the latch and the type sector moves until rear end of slot 20 therein engages pin 21 on sector 3 so that type element representative of fourteen, if the amount in pounds avoirdupois sensed from the card is from fourteen to twentyseven is moved to printing position relative to platen 22. If zero stop 7 for sector 3 is not lowered, the amount is printed. If it is lowered, then the sector 12 moves forward together with sector 3 until latter is arrested by a set-up stop 6 and the type element is thus moved to printing position representative of the sum of fourteen and the amount represented by the stop 6. On a total taking operation the register wheels are moved into engagement with the toothed sectors. A pin 44 on type sector 12 is engaged by delay latch 43 by downward movement of a member 63 (not shown), and when arms 27 are restored, the sectors 2, 3 move forward under control of wheels 1, sector 127 (not shown) being delayed by a predetermined interval. The print hammer mechanism and the means for controlling the engagement and disengagement of the register wheels with their toothed sectors is similar to that described in Specification 526,762 as is also the back total shaft 84 and the means for withdrawing the zero stops 7 of the stop-basket. The transfer or carry mechanism may be of the kind described in Specification 528,106.